>On February 21, 2007 4:43:34 PM +0100 [EMAIL PROTECTED] wrote: >> >>> I cannot let you say that. >>> Here in my company we are very interested in ZFS, but we do not care >>> about the RAID/mirror features, because we already have a SAN with >>> RAID-5 disks, and dual fabric connection to the hosts. >> >> But you understand that these underlying RAID mechanism give absolutely >> no guarantee about data integrity but only that some data was found were >> some (possibly other) data was written? (RAID5 never verifies the >> checkum is correct on reads; it only uses it to reconstruct data when >> reads fail) > >um, I thought smarter arrays did that these days. Of course it's not >end-to-end so the parity verification isn't as useful as it should be; >gigo.
Generate extra I/O and verify parity, is that not something that may be a problem in performance benchmarking? For mirroring, a similar problem exists, of course. ZFS reads from the right side of the mirror and corrects the wrong side if it finds an error. RAIDs do not. Casper _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
